ANSTO Publications Online >
Conference Publications >
Conference Publications >

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/2068

Title: Measurement of fracture toughness of hydrided Zircaloy - 4.
Authors: Callaghan, MD
Yeung, WY
Ripley, MI
Carr, DG
Keywords: Zircaloy 4
Fracture Properties
Zirconium
Mechanical Properties
Hydrogen
Alloys
Issue Date: 2004
Publisher: The Institute of Materials Engineering Australasia Ltd.
Citation: Callaghan, M. D., Yeung, W. Y., Ripley, M. I., & Carr, D. G. (2004). Measurement of fracture toughness of hydrided Zircaloy - 4. International Conference and Exhibition on Adaptive Materials for a Modern Society, 1st - 3rd October 2003. UTS Haymarket Compus: Sydney, Australia. In Materials Forum (Adaptive Materials), 27, 68-73.
Abstract: Zircaloy-4 is a zirconium alloy that will be used for construction of many of the core components in the replacement research reactor at Lucas Heights. The fracture toughness of the alloy and its radiation-induced reduction over the 40 year planned life of the reactor is an important mechanical property for this application. This study aims to simulate the radiation-induced reduction in fracture toughness by hydriding Zircaloy-4. A range of fracture toughnesses is required to calibrate the sub-size Charpy and small punch (SP) surveillance specimens that will be irradiated over the life of the reactor against standard J1C fracture toughness specimens. Pieces of Zircaloy-4 plate were hydrided in a vessel at a temperature of 520°C, at different pressures for either 10 or 22 hours. Final hydrogen concentrations between 25 wt% ppm and 380 wt% ppm hydrogen were obtained under gaseous atmosphere. The fracture toughness of the hydrided Zircaloy-4 was assessed using sub-size 2.5 mm-thick Charpy, three-point bend J1C and SP tests. The results were correlated to determine the relationship between the J-integral fracture toughness, Charpy impact energy and equivalent fracture strain (εqf) from the SP tests. It was found that as hydrogen concentration and hydride formation increased, the fracture toughness of the alloy generally decreased. The results show there to be a useful relationship between fracture toughness and εqf measured for the SP tests.
URI: http://www.materialsaustralia.com.au/lib/pdf/MF%20Vol27%20Paper%2010%20Callaghan.pdf
http://apo.ansto.gov.au/dspace/handle/10238/2068
ISSN: 0883-2900
Appears in Collections:Conference Publications

Files in This Item:

There are no files associated with this item.

Items in APO are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback